Only some Ryanair aircraft (the newer ones) have life jackets stored in panels above the seats. Ryanair's safety briefing, curiously, states both positions (underseat and panel above head) whilst the safety card stuck to the seat in front gives the actual location. The small holes in the panels - with transparent plastic, presumably to allow crew to check if the life jackets are in place - are another indication that life jackets are not to be found under the seats.